The correct answer is: a) Uranium.
Uranium is a radioactive mineral that is found in nature. It is used to generate electricity in nuclear power plants. Andhra Pradesh is one of the states in India that has reserves of uranium.
Thorium is another radioactive mineral that is found in nature. It is not as common as uranium, but it is also used to generate electricity in nuclear power plants. Plutonium is a man-made radioactive element that is used in nuclear weapons. Radium is a radioactive element that is used in medical treatments.
Here is a table that summarizes the information about each of the options:
| Option | Description |
|—|—|
| Uranium | A radioactive mineral that is found in nature. It is used to generate electricity in nuclear power plants. |
| Thorium | Another radioactive mineral that is found in nature. It is not as common as uranium, but it is also used to generate electricity in nuclear power plants. |
| Plutonium | A man-made radioactive element that is used in nuclear weapons. |
| Radium | A radioactive element that is used in medical treatments. |